JPH0633961B2 - Falling film type liquid heating device - Google Patents

Falling film type liquid heating device

Info

Publication number
JPH0633961B2
JPH0633961B2 JP63070841A JP7084188A JPH0633961B2 JP H0633961 B2 JPH0633961 B2 JP H0633961B2 JP 63070841 A JP63070841 A JP 63070841A JP 7084188 A JP7084188 A JP 7084188A JP H0633961 B2 JPH0633961 B2 JP H0633961B2
Authority
JP
Japan
Prior art keywords
liquid
heat exchanger
screen
falling film
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP63070841A
Other languages
Japanese (ja)
Other versions
JPS63297993A (en
Inventor
アクセル．イー．ローゼンブラツド
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rosenblad Corp
Original Assignee
Rosenblad Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rosenblad Corp filed Critical Rosenblad Corp
Publication of JPS63297993A publication Critical patent/JPS63297993A/en
Publication of JPH0633961B2 publication Critical patent/JPH0633961B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
    • F28D3/04—Distributing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/008—Liquid distribution
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C7/00—Digesters
    • D21C7/10—Heating devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Paper (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は流下膜型熱交換器における液体の加熱に関し、
特に加熱される液体内の固型粒子が孔のある液体分配皿
の液体分配出口を目詰まりすること、又は熱交換器の加
熱面に到達することを防ぐためのスクリーン装置に関す
る。The present invention relates to heating a liquid in a falling film heat exchanger,
In particular, it relates to a screen device for preventing solid particles in the heated liquid from clogging the liquid distribution outlet of the perforated liquid distribution dish or reaching the heating surface of the heat exchanger.

（従来の技術） 流下膜板型熱交換器は広く色々の工業的用途を持つてい
る。このような流下膜型熱交換器は米国特許第3332469
号、第3307614号、第3366158号に示し、述べられてい
る。このような熱交換器では蒸気との間接熱交換により
加熱される液体は２枚の板型加熱要素の外面を下降する
流下膜として流れ、これら要素の板の間を循環する蒸気
と熱交換することにより加熱されるよう導かれる。液体
が板面を一様に流下するよう液体を分配するための普通
の装置の一つは、板型熱交換要素の頂記の上に置かれる
孔のある水平に置かれた皿で構成される。皿の孔は板要
素の頂縁の上に置かれる。(Prior Art) Falling-film heat exchangers have a wide variety of industrial applications. Such a falling film heat exchanger is disclosed in US Pat. No. 3,332,469.
Nos. 3307614 and 3366158. In such a heat exchanger, the liquid heated by indirect heat exchange with steam flows as a falling film down the outer surface of the two plate heating elements and by heat exchange with the steam circulating between the plates of these elements. Guided to be heated. One of the common devices for distributing liquid so that it flows down the plate surface uniformly consists of a horizontal plate with holes that sits on top of the plate heat exchange element. It The hole in the dish is placed on the top edge of the plate element.

（発明が解決しようとする課題） このような有孔皿の孔は、加熱される液体が大きい固型
粒子を浮遊して相持するならば目詰まり又は妨害する。
例えば、流下膜板型、熱交換器が木材パルプ工業の回分
蒸解器用外部加熱装置として使われる時は、液体内に捕
捉された木材粒子は熱交換器の液体分配皿の孔を目詰ま
りさせ、それにより板要素への液体の一様な分配を妨害
する。(Problems to be Solved by the Invention) The holes of such a perforated dish will be clogged or obstructed if the heated liquid suspends and carries large solid particles.
For example, when a falling plate type heat exchanger is used as an external heating device for a batch pulp digester of the wood pulp industry, the wood particles trapped in the liquid clog the holes in the liquid distribution tray of the heat exchanger, This hinders the uniform distribution of liquid to the plate elements.

本発明の目的は液体分配皿などの孔の目詰まりの問題に
解決した流下膜型液体加熱装置を提供することである。
望ましくない粒子は皿及び加熱面を回避するよう転向さ
れる。An object of the present invention is to provide a falling film type liquid heating apparatus which solves the problem of clogging of holes in a liquid distribution dish or the like.
Unwanted particles are diverted to avoid the dish and heating surface.

（課題を解決するための手段） 本発明によれば、液体分配皿の孔より小さい開口を持つ
傾斜スクリーンは皿の上方、加熱される液体の熱交換器
内への入口の下方に取付けられる。さもなければ液体分
配皿の孔を目詰まりするかも知れない固型粒子はスクリ
ーンの孔を通して進むことが出来ず、それゆえ皿の孔に
は到達出来ない。スクリーン面が水平から傾斜している
から、ふるい分れられた粒子は、板の加熱面を回避する
ようスクリーンの外面で流法され、熱交換器から汲出さ
れる。According to the invention, a tilting screen with openings smaller than the holes in the liquid distribution pan is mounted above the pan, below the inlet of the liquid to be heated into the heat exchanger. The solid particles, which might otherwise clog the holes in the liquid distribution dish, cannot pass through the holes in the screen and therefore cannot reach the holes in the dish. Since the screen surface is inclined from horizontal, the screened particles are flowed on the outer surface of the screen to avoid the heated surface of the plate and are pumped from the heat exchanger.

（作 用） スクリーンは、スクリーンに液体を供給する装置のよう
に色々の方法で置くことが出来るけれども、本発明の現
在好適な実施例は、ほぼ円錐型のスクリーンを使つてお
り、その頂点は液体がスクリーンに供給される点の下に
中心がある。約６０゜の角度で傾斜する面を持つ直円錐
型のスクリーンは固型粒子を効果的に転向する。スクリ
ーンは又ピラミツド型を持ち、その基部は液体分配皿の
周辺に対応しても、又は傾斜側部を与えるその他の形状
でもよい。(Working) Although the screen can be placed in a variety of ways, such as a device that supplies liquid to the screen, the presently preferred embodiment of the present invention uses a substantially conical screen whose apex is Below the point where liquid is supplied to the screen is the center. A right-cone type screen having a surface inclined at an angle of about 60 ° effectively diverts solid particles. The screen also has a pyramid shape, the base of which may correspond to the perimeter of the liquid distribution dish, or other shape that provides a beveled side.

スクリーンをワイヤーのコイルから形成し、ワイヤーは
例えば三角形断面でその縁は鋭くなく、いくらか丸味を
持つのが現在好ましい。It is presently preferred that the screen is formed from a coil of wire, the wire having, for example, a triangular cross section, its edges not sharp and somewhat rounded.

（実施例） 第１図に示すように、符号10で全体として示す板型流下
膜熱交換器は外側ハウジング11を持ち、その中に熱交換
板要素12のほぼ平行垂直の対の列が収容される。板型熱
交換要素12の各々は板周辺の所で一緒に接合された一対
の板で形成され、矢印13で示す加熱蒸気入口と、矢印14
で示す凝結液出口とを持つている。EXAMPLE As shown in FIG. 1, a plate type falling film heat exchanger, indicated generally by the numeral 10, has an outer housing 11 in which a pair of substantially parallel and vertical rows of heat exchange plate elements 12 are housed. To be done. Each of the plate heat exchange elements 12 is formed of a pair of plates joined together at the periphery of the plates, a heated steam inlet indicated by arrow 13 and an arrow 14
It has a condensed liquid outlet indicated by.

図面には、ハウジング11の頂部で熱交換器12に加熱され
る液体を供給する入口15と、加熱された液体を集めるた
めのハウジング11の底部の空間16とがあり、空間から加
熱された液体は管17を経て流出し、ポンプＰにより循環
される。In the drawing there is an inlet 15 for supplying the heated liquid to the heat exchanger 12 at the top of the housing 11 and a space 16 at the bottom of the housing 11 for collecting the heated liquid, the liquid being heated from the space Exits via line 17 and is circulated by pump P.

液体分配皿18は板型熱交換器12の上縁の上に置かれ、且
つ板の縁と整合した孔を持つよう示されている。傾斜ス
クリーン19は液体入口15の下方、液体分配皿18の上方に
置かれ、加熱される液体と共に入る固型粒子が分配皿18
に到達してその孔を恐らく目詰まりする前に粒子を阻止
する。スクリーン19により阻止される粒子はスクリーン
の傾斜側部を下降し、板要素12の面上を通ることなく加
熱された液体と共に排出される。The liquid distribution pan 18 is placed on the upper edge of the plate heat exchanger 12 and is shown to have holes aligned with the edges of the plate. The tilted screen 19 is placed below the liquid inlet 15 and above the liquid distribution pan 18 so that solid particles entering with the heated liquid are distributed pan 18.
Block the particles before they reach and possibly clog the pores. The particles blocked by the screen 19 descend on the inclined side of the screen and do not pass over the face of the plate element 12 but are discharged with the heated liquid.

皿18とスクリーン19とは第２図に、より詳しく示されて
いる。第２図に示す要素の寸法は、本発明の原理を示す
目的のため誇張されている。図面矢印で示すように、加
熱される液体はパイプとして簡単に示す入口15を経て入
り、液体分配皿18により熱交換要素12に分配されるよう
スクリーン19にこれを経て進み、この液体供給装置は何
か他の型のものでもよい。皿18はほぼ平らな水平底部21
と垂直側壁22とを持つている。皿底部21内の複数個の孔
23は板型要素12の幅にわたつて一様に加熱されるよう液
体を分配するように置かれる。孔23の相対寸法は、皿18
の上に直接あるように示されているスクリーン19を通る
開口24の寸法と共に図示目的のため誇張されている。ス
クリーン19により転向される固型粒子が皿18の側壁22の
外側に落ちるよう十分に大きい。スクリーン19の全体形
状は円錐型又はピラミツド型で、その側部は水平に対し
斜め、なるべく約６０℃で傾斜しているのがよい。The dish 18 and screen 19 are shown in more detail in FIG. The dimensions of the elements shown in FIG. 2 are exaggerated for purposes of illustrating the principles of the invention. As indicated by the arrow in the drawing, the liquid to be heated enters through an inlet 15, which is shown schematically as a pipe, and passes therethrough to a screen 19 for distribution to a heat exchange element 12 by a liquid distribution tray 18, which liquid supply device It can be of some other type. Dish 18 has a substantially flat horizontal bottom 21
And with vertical sidewalls 22. Multiple holes in the pan bottom 21
The plate 23 is placed so as to distribute the liquid so that it is heated uniformly across the width of the plate-shaped element 12. The relative dimensions of the holes 23 are
Is exaggerated for illustration purposes with the dimensions of the aperture 24 through the screen 19 shown directly above. The solid particles deflected by the screen 19 are large enough to fall outside the side wall 22 of the dish 18. The overall shape of the screen 19 is a conical shape or a pyramid shape, and it is preferable that its side portions are inclined with respect to the horizontal and inclined at about 60 ° C.

スクリーン19は図示のようにワイヤのコイルで形成する
のがよく、その断面は隅の丸められた三角形である。ス
クリーンを通る開口24は分配皿18の孔23より小さく、そ
れゆえ孔23を目詰まりするほど大きい粒子はスクリーン
19を通ることが出来ない。誇張された寸法の固型粒子は
第２図の中間左側にスクリーン19により阻止されて示さ
れている。The screen 19 is preferably formed of a coil of wire as shown, the cross section of which is a triangle with rounded corners. The openings 24 through the screen are smaller than the holes 23 in the distributor pan 18 and therefore particles large enough to clog the holes 23 are
I can't go through 19. Solid particles of exaggerated size are shown blocked by screen 19 in the middle left side of FIG.

スクリーン19は、加熱される液体と共に熱交換器10に入
る固型粒子が液体分配皿18の孔23を目詰まりすることを
効果的に防ぐ。阻止された粒子は皿18と熱交換板要素12
とを回避し、熱交換器10から排出される。粒子は加熱さ
れた液体と共に循環し、熱交換器10を加熱された液体と
共に出て、必要ならばこれから分離される。The screen 19 effectively prevents solid particles entering the heat exchanger 10 with the liquid being heated from clogging the holes 23 in the liquid distribution dish 18. The blocked particles are contained in the pan 18 and the heat exchange plate element 12
And is discharged from the heat exchanger 10. The particles circulate with the heated liquid and exit the heat exchanger 10 with the heated liquid and separated therefrom if necessary.

第３図は本発明の応用例を示し、ここでは熱交換器10は
木材チツプを処理するため木材パルプ工業で使われる型
の蒸解器用の外部加熱装置として使われる。処理液は符
号25で全体として示す蒸解器から、熱交換器10の入口15
にパイプ26を経て抽き入れられる。熱交換器10内で加熱
されてから、液体はパイプ27を経て頂部で及び又パイプ
28を経て蒸解器の底部で蒸解器25内に再び導入される。
パルプ工業の当業者にとつて、この方法がより良い循環
のためになされる事が認められる。蒸解器25にはごみ除
け29が設けられているよう示され、ごみ除けはパイプ26
を経て大きい固型粒子が外に出ることを防ぐけれども、
粒子のいくらかはパイプ26に入るから、スクリーン19は
このような粒子による液体分配皿の目詰まりを防ぐよう
働らき、これら粒子は次にパイプ17、27、28を経て蒸解
器25に戻る。第３図の装置は本発明の加熱装置の応用例
のほんの一例を示している。FIG. 3 shows an application of the invention in which the heat exchanger 10 is used as an external heating device for a digester of the type used in the wood pulp industry for treating wood chips. The treatment liquid is supplied from the digester indicated by reference numeral 25 to the inlet 15 of the heat exchanger 10.
It is extracted via pipe 26. After being heated in the heat exchanger 10, the liquid passes through the pipe 27 at the top and also the pipe.
It is reintroduced into the digester 25 at 28 at the bottom of the digester.
It will be appreciated by those skilled in the pulp industry that this process is done for better circulation. The digester 25 is shown to be equipped with a debris 29, which is a pipe 26
Although it prevents large solid particles from going out through
Since some of the particles enter pipe 26, screen 19 acts to prevent such particles from clogging the liquid distribution pan, which particles then return to digester 25 via pipes 17, 27, 28. The apparatus shown in FIG. 3 shows only one application example of the heating apparatus of the present invention.

【図面の簡単な説明】[Brief description of drawings]

第１図は本発明によるスクリーンが設けられた板型流下
膜熱交換器を示す図、第２図は第１図のスクリーンの断
面詳細図、第３図は木材パルプ工業で使われる型の回分
蒸解器と結合したスクリーンを持つ熱交換器の応用例を
示す図である。 10……熱交換器、11……ハウジング、12……要素、13、
14……矢印、15……入口、16……空間、17……パイプ、
18……分配皿、19……スクリーン、21……底部、22……
側壁、23……孔、24……開口、25……蒸解器、26、27、
28……パイプ、29……ごみ除け。FIG. 1 is a view showing a plate type falling film heat exchanger provided with a screen according to the present invention, FIG. 2 is a detailed sectional view of the screen of FIG. 1, and FIG. 3 is a batch of a mold used in the wood pulp industry. It is a figure which shows the application example of the heat exchanger which has the screen combined with the digester. 10 …… Heat exchanger, 11 …… Housing, 12 …… Element, 13,
14 …… arrow, 15 …… entrance, 16 …… space, 17 …… pipe,
18 …… Distributing pan, 19 …… Screen, 21 …… Bottom, 22 ……
Side wall, 23 ... hole, 24 ... opening, 25 ... digester, 26,27,
28 …… Pipe, 29 …… Removing garbage.

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】蒸気と加熱面を下降する流下膜として流れ
る液体との間で間接的に熱交換するため前記加熱面を持
つ型の流下膜型熱交換装置において、前記加熱面に加熱
される液体を分配するための開口を持つ液体分配装置
と、前記液体分配装置の前記開口を詰まらせる固型粒子
が前記分配装置に進むのを防ぐため液体入口と前記液体
分配装置との間に置かれる傾斜スクリーンとを持つてい
る流下膜型熱交換器。1. A falling film type heat exchange device of a type having the heating surface for indirectly performing heat exchange between vapor and a liquid flowing as a falling film descending the heating surface. A liquid dispensing device having an opening for dispensing a liquid, and a liquid particle located between the liquid inlet and the liquid dispensing device to prevent solid particles clogging the opening of the liquid dispensing device from entering the dispensing device. Falling-film heat exchanger with inclined screen. 【請求項２】請求項第１項の熱交換器において、前記傾
斜スクリーンはほぼ円錐型である流下膜型熱交換器。2. The heat exchanger according to claim 1, wherein the inclined screen has a substantially conical shape. 【請求項３】請求項第１項の熱交換器において、前記ス
クリーンはワイヤのコイルで形成され、且つ前記液体分
配装置の前記開口よりせまい通路を前記ワイヤの隣接コ
イル間に持つている流下膜型熱交換器。3. The heat exchanger according to claim 1, wherein the screen is formed of a coil of wire, and the screen has a narrow passage from the opening of the liquid distributor between adjacent coils of the wire. Type heat exchanger. 【請求項４】請求項第１項の熱交換器において、前記ス
クリーンは水平から約６０゜の角度で傾斜している流下
膜型熱交換器。4. The heat exchanger according to claim 1, wherein the screen is inclined at an angle of about 60 ° from the horizontal. 【請求項５】板型流下膜熱交換器にして、複数個のほぼ
平行垂直板の熱交換要素と、前記板熱交換要素に液体を
一様に分配するため前記板熱交換要素の項記の上に置か
れた孔を持つ液体分配皿とを持つ板型流下膜熱交換器に
おいて、前記分配皿に供給される液体から固型粒子をふ
るい分けることにより前記孔の目詰まりを防ぐための傾
斜スクリーンを持つている流下膜熱交換器。5. A plate type falling film heat exchanger, comprising a plurality of substantially parallel vertical plate heat exchange elements, and the plate heat exchange elements for uniformly distributing a liquid to the plate heat exchange elements. A plate type falling film heat exchanger having a liquid distribution tray having holes placed on the top of the liquid distribution tray for preventing clogging of the holes by sieving solid particles from the liquid supplied to the distribution tray. Falling film heat exchanger with tilting screen. 【請求項６】請求項第５項の熱交換器において、前記傾
斜スクリーンは円錐型であり、その頂点は前記液体の入
口に向いている流下膜熱交換器。6. The falling film heat exchanger according to claim 5, wherein the inclined screen has a conical shape, and the apex thereof faces the inlet of the liquid. 【請求項７】請求項第５項の熱交換器において、前記ス
クリーンはワイヤのコイルで形成され、且つ前記液体分
配皿の前記孔より小さい通路を前記コイルのワイヤの間
に持つている流下膜熱交換器。7. The heat exchanger according to claim 5, wherein the screen is formed of a coil of wire and has a passage smaller than the hole of the liquid distribution tray between the wires of the coil. Heat exchanger. 【請求項８】請求項第５項の熱交換器において、さらに
固型粒子を前記熱交換器から加熱された液体と共に排出
する装置を有する流下膜熱交換器。8. The falling film heat exchanger according to claim 5, further comprising a device for discharging the solid particles from the heat exchanger together with the heated liquid.
JP63070841A 1987-05-21 1988-03-24 Falling film type liquid heating device Expired - Lifetime JPH0633961B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52398 1987-05-21
US07/052,398 US4764254A (en) 1987-05-21 1987-05-21 Falling film liquor heater having a screen to prevent clogging of a liquid distributing tray

Publications (2)

Publication Number Publication Date
JPS63297993A JPS63297993A (en) 1988-12-05
JPH0633961B2 true JPH0633961B2 (en) 1994-05-02

Family

ID=21977359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63070841A Expired - Lifetime JPH0633961B2 (en) 1987-05-21 1988-03-24 Falling film type liquid heating device

Country Status (15)

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US8486223B2 (en) * 2003-07-04 2013-07-16 Jiangsu Sinorgchem Technology Co., Ltd. Falling film evaporator
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FI882404A0 (en) 1988-05-20
FI882404A (en) 1988-11-22
SE469094B (en) 1993-05-10
FI86379B (en) 1992-05-15
JPS63297993A (en) 1988-12-05
US4764254A (en) 1988-08-16
NZ223863A (en) 1989-07-27
DE3808026A1 (en) 1988-12-01
GB8810187D0 (en) 1988-06-02
GB2205048B (en) 1991-05-22
AU596305B2 (en) 1990-04-26
IT8847986A0 (en) 1988-05-19
NO169252C (en) 1992-05-27
ATA130988A (en) 1992-11-15
FI86379C (en) 1992-08-25
NO169252B (en) 1992-02-17
BR8802046A (en) 1988-11-29
NO881558D0 (en) 1988-04-11
FR2615607B1 (en) 1990-02-09
AU1617188A (en) 1988-11-24
NO881558L (en) 1988-11-22
ZA882035B (en) 1988-11-30
SE8801864D0 (en) 1988-05-18
IT1235003B (en) 1992-06-16
DE3808026C2 (en) 1991-06-20
CA1306940C (en) 1992-09-01
FR2615607A1 (en) 1988-11-25
SE8801864L (en) 1988-11-22
GB2205048A (en) 1988-11-30

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